Bruising behind placenta??

Brittney

Hey everyone! We had our dating scan on Wednesday at 9 weeks 6 days, the baby measured 10 weeks 2 days! The heartbeat was 170. 💕 The doctor said there was a little bruising behind the placenta and it could cause me to spot and usually it goes away on its own. And that we would keep a close eye on it, next scan is at 20 weeks. I haven’t spotted at all since being pregnant. Is this something to be worried about? First time mommy! I also do not see the yolk sac or placenta in the pictures but I could be missing it.